#1 That the protection on the copy is "sufficient" to protect the rights of a copyright holder of the original work, and
#2 That the copyright owner is satisfied with the protection provided by the copied work.
To me at least, this seems insane. You can theoretically claim DCMA based relief for anything forever by taking its bitstream format and flipping every bit once. That coupled with the knowledge of the copyright owner will be enough to be covered under this reading of "effective".
AI rebuttal about it not being AI